There are not many jobs for which there are no qualifications; even digging ditches requires some skill. To claim that there are no conditions that must be met to be fit for a job is to claim that the job is not worth doing or the job is of no value.
In Psalm 15, David explained that anyone desiring to belong to the Lord must measure up. This is not to say that fulfilling these qualifications earns any job entrance, security or tenure, but that God does not accept just anyone; there are qualifications.
David asks the question, “Lord who may abide in Your tabernacle? Who may dwell in Your holy hill?” The question implies discrimination. This question of who is qualified to abide and dwell with God is answered in the remainder of the Psalm.
In order to approach God, several qualifications are stipulated:
 One must walk uprightly (you cannot be called a child of God and walk in sin, Matthew 7:13-14).  One must work righteousness (Hebrews 11:32-38).  One must speak the truth (Revelation 21:8).  One must treat one’s fellow laborers properly (1 John 5:20-21).  One must discern between right and wrong (love the right and despise the wrong (Jeremiah 8:11-12).  One cannot be bought (Philippians 3:8; the laborer in God’s vineyard has no sellout price, Galatians 4:16).
In the concluding statement, David drives home the point of the psalm. “He who does these things shall never be moved.” If one chooses not to do any one of “these things” that person is not qualified. Don’t be fooled with feel-good gospels that preach a salvation void of qualifications.